The dependence of the dielectronic reconbination (DR) cross section on crossed electric and magnetic fields is described. The enhancement of this cross section due to a static electric field is further increased when a magnetic field is added perpendicular to the electric field. Calculation of this field induced enhancement is presented for a realistic atomic model and the mechanism for the enh...

The recent speculation on the possibility of achieving gigantic enhancement for surface-enhanced Raman scattering at cryogenic substrate temperatures is examined using a simple theoretical model. The surfaceplasmon enhancement mechanism is modeled using the Fermi-electron gas approach instead of the Drude model as used previously in the literature. Due to the diminution of substrate polarizabil...

ZnO nanorods (NRs) are known for ultra-sensitive biomolecule detection through fluorescence enhancement. In this work, we demonstrate that ZnO NR arrays grown on Ag layers can significantly improve the enhancement up to 86 times compared to that grown on bare Si, and the enhancement can be modified in a controlled manner by varying Ag thickness. The much improved waveguide properties are attrib...

Thermal enhancement of upconversion luminescence in lanthanide-doped nanocrystals are summarized and the mechanism is discussed detail with a fresh perspective.

Graphene-enhanced Raman scattering (GERS) is a recently discovered Raman enhancement phenomenon that uses graphene as the substrate for Raman enhancement and can produce clean and reproducible Raman signals of molecules with increased signal intensity. Compared to conventional Raman enhancement techniques, such as surface-enhanced Raman scattering (SERS) and tip-enhanced Raman scattering (TERS)...

kinematic synthesis of a trailing six-member mechanism has been carried out to achieve five precision points of an automotive steering mechanism. the inner wheel can be rotated up to forty five degrees with fair accuracy. results show that the divergent end behavior of ackermann steering mechanism has been overcome by the present mechanism. the work is similar to earlier work by the present aut...